Coating apparatus



Dec. 3, 1935. W 1 MaoKENzlE f 2,022,777

CATING APPARATUS Filed DeC. 16, 1931 Patented Dec. 3, 1935 PATENT OFFICE COATING APPARATUS Wilbur L. MacKenzie, Beverly, Mass.. assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application December 16, 1931, Serial No. 581,355

7 Claims.

My invention relates to apparatus for applying cement or a solvent therefor to work-surfaces, it being particularly intended for coating shoeparts, as the lasted-in margins of uppers in preparation for the attachment of outsoles to them.

The invention has as an object the application of the chosen substance to the work in a band of a definite width and substantially uniform thickness by` relatively simple means readily manipulated by the operator. For the attainment of this object, I have combined with a conduit, through which the liquid is delivered, an applying member in the form of a roll journaled between sidewalls, which may be portions of a casing terminating a delivery-nozzle. "I'hisroll, which, as illustrated, has circumferential rows of projections, takes the liquid from the casing as it is supplied by the conduit and lays it upon the work over an area the width oi.' which is approximately the same as that of the roll. The nozzle may be mounted, as upon a flexible delivery-tube, to travel over the work, thus producing the desired extended band. There is shown means for governing the amount of liquid applied by the member, as by means movable upon the nozzle or device toward and from the periphery or the roll. This controlling means may be in the form of a gate or gates one of which, as illustrated, is U-shaped with its arms pivoted to the sides of the casing and is arranged to -be xed in dierent positions with the casing, it retains a puddle of cement immediately above lthe roll.

I have illustrated in the accompanying drawing a single embodiment of my invention. Here,

Fig. 1 shows the apparatus in perspective;

Fig. 2l is a central vertical section through the applying nozzle;

Fig. 3, a broken top plan of the pump;

Fig. 4, a perspective view of the nozzle ,in use; and

v Fig. 5 is a section through the nozzle taken on y l receptacle is joined to a pump I4, which may have a pair oi' meshing gears I6 constantly rotated by connections I8 during the operation of the apparatus. The opposite side o1'- thepump from the inlet has connected to it a ilexible tube or conduit 2li. Receiving at the outer end of the conduit the cement forced from $1.19 receptacle by the pump is a nozzle or delivery device A, the flow to which is preferably controlled at the will of the operator by a valve 22 inserted between the conduit-and nozzle. This valve may be of the spring-seated plunger type, and the pump-dis- 5 charge may be by-passed through a relief-valve 23 when delivery is cut oil by the valve 22. The nozzle A has a tubular portion 24 convenient for the operator to grasp. At the outer extremity of the tube is an enlargement 28, preferably in the 10 form of a rectangular head, from which extend outwardly spaced sidewalls 30, 30 furnishing a partial casing. Between the sidewalls, near the forward portion of what may be termed the lower edges, extends a spindle 32, upon which is rotatl5 able an applying roll 34. 'I'he width of this roll is such as to practically fill 'the space between the Walls 30, and one portion of its periphery lies well outside their edges at the end of said walls which are near the spindle while another portion lo1' the 20 periphery is within the upper edges of the walls. 'I'he roll is shown as having an applying surface furnished by a series o1' narrow cement-carrying grooves 88 separated by circumferential rows of projections 38, in which projections are series of 25 depressions 40 with intermediate teeth 42. The teeth increase the traction oi the roll upon the work. These depressions, as well as the grooves, hold the cement for application to the work. Because of the small area of the ends oi the teeth, 30 the band applied is in eil'ect continuous. At the ends of the roll are smooth flanges with continuous edges preventing lateral spreading of the band ol.' cement applied. To complete the casing for the retention of the cement in contact with 35 a small quantity oi' roll, a slide or gate 44 is secured to the lower edge of the head 28 by a slotand-screw connection 48. This slide may be adjusted closely enough to the periphery of the roll 34 to prevent downward escape of the cement 40 from the casing. At 41 on the upper forward corners of the walls 80, 30 is pivoted a U-shaped gate 50, by means of side arms 48, 48, and this gate may be held by slot-and-screw connections 52 to the side-walls with its lower edge at the 45 desired distance from the periphery of the roll. 'I'he side walls oi the casing and the gate oo operate to retain a puddle of cement immediately above the roll. This gate also governs the amount of cement which the roll will carry forward to the 50 work. The gate 50 has projections (Fig. 2) entering the grooves 38, thereby better to control the quantity of cement applied.

In using the apparatus of this invention for ementlng the margins m oi the bottoms oi' shoes, 55

one of which appears at S in Fig. 4, the receptacle I0 is supplied with pyroxyln or other adhesive, and the pump i4 set in rotation. With the work supported upon a jack or surface before him, the operator holds the nozzle A by the tube 24, with the slide 44 downward, and opens the valve 22 to allow the cement to flow into the nozzle-casing. A nozzle will have been chosen in which the roll 34 is equal in transverse dimension to the width of the band to be coated. The roll is pressed against the work and the nozzle moved forward, causing said roll to rotate in the direction of the arrow in Fig. 2, the teeth 42 engaging the work-surface and compelling the roll to turn without slipping.. The cement is thereby raised from the casing and carried forward and down upon the periphery of the roll, the thickness depending upon the space between the lower edge of the gate and the roll. The slide 44 prevents the cement from escaping along the rising side of the roll. The exibility of the tube allows the nozzle to be moved freely in any direction, to follow the marginal contour of the shoe-bottom, which may be turned at the same time to facilitate the application of the cement to the chosen area. During the operation upon the work-piece, or between these operations, the valve 22 may be permitted to close to a greater or less extent to give the proper quantity of the adhesive in the casing. Or the nozzle-casing may be filled in successive charges. When the valve 22 is opened, any harmful tendency of the coating substance to jet from the nozzle A because of the pressure supplied by the continuously operated pump I4, is nullied by the construction employed. The roll 34 and the gate 50 lie in the direct path of such a sudden jet or stream, and the puddle of cement retained in the nozzle acts as a buffer or` surge preventer, thereby avoiding awkward delivery of a stream of substance upon the operator or parts of the work which are not to be coated. It will be apparent that this comparatively simple and inexpensive apparatus, with little adjustment or other attention, may be utilized for a wide range of work, applying the coating in bands of uniform width and thickness. v

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a coating apparatus, a flexible tube, a nozzle connected to the tube and having spaced parallel side Walls, an applying roll rotatable upon the nozzle iitting closely between said side walls and arranged for contact with the work, and a U-shaped gate pivoted between said side Walls cooperating with them to retain a puddle of coating substance immediately above the roll and movable toward and from the periphery of the roll to control the quantity of coating substance applied. 5

2. In a cementing apparatus, a flexible tube,

a nozzle connected to the tube and having a cementddelivering opening, a cement-applying roll rotatable upon the nozzle and having circumferential rows oi' projections spaced from one 10 another by narrow grooves, and a cement-retaining member movable upon the lower side of the nozzle toward and from the projections.

3. In a cementing apparatus, a exible tube,

a nozzle connected to the tube and provided with 15 a casing at its outlet-end, and a cement-applying roll journaled in the sides of the casing, the casing having an adjustable, slidably mounted lower wall extending into proximity with the periphery of the roll.

4. A cement-applying nozzle comprising a tube provided with a casing at its outlet-end, a grooved roll journaled in the sides of the casing, and a gate pivoted to the casing and having projections entering said grooves, said gate being swingable 13 toward and from the periphery of the roll.

5. A cement-applying nozzle comprising a tube provided with a casing at its outlet-end and having a gate arranged to slide on the casing' at its under side and a gate pivoted on the casing at .'10 its upper side to control the quantity of cement applied to the work, and an applying roll rotatable upon the casing between the gates.

6. In a coating apparatus, a container, a ilexible tube having a nozzle, a valve interposed between said tube and said nozzle, and a continuously operated device creating a pressure in the tube, said nozzle having an applying roll and a controlling gate therefor positioned in the path of a stream issuing from the nozzle whereby the 40 application of an undesired jet of coating substance upon the work is prevented when the valve is opened.

7. In a coating apparatus, a container, a ilexible tube having a nozzle, a valve interposed be- 45 tween said tube and said nozzle, a continuously operated device vcreating a pressure in the tube, said nozzle being provided with an open-sided casing, a roll journaled 1n said casing, and a gate associated with said roll and with the casing providing a retainer for a puddleof coating substance which will act as a buffer to restrain a jet issuing from the nozzle upon the opening of the valv WILBUR L. MACHINZIE.

CERTIFICA'I'E 0F CORRECTION. 5

Patent No. 2,022,777. December 3, 1935.

WILBUR L. MacKENZIE.

lt is hereby certified that error appears in the printed specification ol the above numbered patent requiring correction as follows: Page l, first column, line 32, for the words "positions with" read positions. With; and second column, line 35, for "the" second occurrence, read a small quantity of; and line 36, for "a small quantity of"read the; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 14th day of January, A. D. 1936.

Leslie Frazer (Seal) Acting Commissioner of Patents. 

